Electrical condenser



June 4, 1929. L. E. MENUT I 1,715,560

ELECTRICAL CONDENSER Filed Feb. 2S. 1926 INVENTORh Leroy [11e/ZM ATTORNEY Patented June 4, 1929.

UNITED STATES PATENT OFFICE.

LEROY E. MENUT, F MOUNT VERNON,l NEW YORK, ASSIGNOR TO DUBILIER CON DENSER CORPORATION, 0F NEW YORK, N. Y., A CORPORATION 0F DELAWARE.

ELECTRICAL CONDENSER.

Application filed February 26, 1926. Serial No. 90,875.

This invention relates to improvements in electrical condensers, and particularly to condensers of constant capacity, known as fixed condensers.'

It is an obj ect of this invention to provide a well'housed condenser, the body or stack of which can be maintained in a state of compression to the required degree, and which may have its terminals projecting from opposite faces of the condenser.

To more clearly disclose the invention, I have shown a practical rembodiment in the accompanying drawings. This is for the purpose o exemplification merely, and hence cetrain of the parts are illustrated diagrammatically. In these drawings:

Fig. 1 is a longitudinal section of the device with the clamping member omitted;

Fig. 2 is a similar section of the clamping or binding member;

Fig. 3 is a central longitudinal section of the assembled condenser;

Fig. 4 is a plan view thereof.

The deviceas shown in Fig. 1 comprises a stack 1 which is composed of a series of elements or sheets of conductive material, such as metal foil, separated by sheets or elements, such as mica. This stack may be of any desired construction in which there is presented at opposite ends, projecting con` ductive elements of opposite polarity.

The stack is adapted to be' mounted between two insulating cover plates 2. The plates 2 are provided with elon ated transverse apertures 3 for a purpose ereinafter to a pear.

Between t e stack and the plates 2 there are mounted bowed metal spring members 5. At the central portion of each member on its conoaveside there is provided a metal projection 6 conforming in cross sectional outline to the aperture 3. This member 5 may be a curved plate with the projection 6 cut or stamped out in the middle as shown by broken lines in Fig. 4, and bent at right angles to the plane of the llate or member 6 carrying it to go through t e aperture 3 of the adjacent plate 2.'

y I have provided a clamping member having side walls 7 and top and bottom flanges nel-shaped annular bindin 8 and 9. This member may have the form of a rectangular ring or frame and be stamped from one piece of metal, and it may be shaped otherwisethan rectangular, according to the outline of the condenser. The top edges have notches cut out at the four corners, as clearly shown in Fig. 2, to form the anges, and to enable the anges 8 and 9 to be crimped over to form a chanand retaining member, that holds the p ates 2 together with the stack 1 between them.

In assembling the unit, the terminal projection 6 of each member 5 is inserted through the aperture 3 of the adjacent coverplate 2. By elongating this aperture transversely and by conforming the terminal 6 to its shape, suitable engagement between the two is assured; hence, any turning or twisting movement of either spring leaf or member 5 with relation to the other parts of the condenser is precluded. I conceive this to be a very important advantage, for it is well understood that but a slight stress on the thin sheets of foil of the stack 1 will disruptit; and such a disruption night wellrender the whole condenser useess.

The stack comprises sheets of foil separated by sheets of mica or other insulation, the alternate sheets of foil being of opposite polarity. As indicated at 4, the ends of the two groups of sheets of foil of opposite polarity project, one group having their ends projecting from one extremity of the stack and folded down on one face of the stack, and the other group having their ends projecting from the opposite extremity and folded down on the opposite face.

In a similar manner the other leaf or member is mounted to have the other terminal 6 go through the second plate 2. Hence. when the plates and members 5 are placed against opposite faces of the stack, theterminals 6 will ,be connected to the two terminals or poles of the condenser. Then the `condenser may be compressed by any suitable means. lIt will be observed that during this compression operation the center of the two members 5 are maintained at fixed points and the members liattened out upon the ends 4 of the two groups of foils. The provision of a non-turning connection between each plate 2 and the projection 6 passing throughcurring between the parts is so limited tol the plates 2 and the members 5 that the ex-A tensions or terminals 6 protrude through the apertures 3 and the ends 'of the members 5 slide along on the inner faces of vthe plates 2.

When the stack and members 5 have been y' compressed the desired extent, the clamping -which the stack is maintained under presmember is set or locked on the plates 2.

The upper fianges 8 may be first folded over at right angles to the sidewalls '7 and then.

fitted down upon the adjacent plate 2 and the bottom flange then crimped under the other plate to secure the stack under compression between the plates.

A condenser unit is now provided 1n sure exerted by the compressed spring members 5. Any slight release in the clamping action of the retaining member 7 has-.no appreeiable effect on the degree .of compression existing in the stack, smce 1t acts thereon only indirectly.

It will be appreciated useful functions. These projections are so constructed that they serve as a termlnal for the unit, and also as guides for the members 5 carrying them. By reason of their particular shape and co-operation with the plates 2, they prevent twisting of the members 5 and thus prevent rupture of the ends of the foils projecting' to be pressed upon by the members 5, at the same time they center the members 5 and obviate4 lateral movement of the members 5 with respect to the protruding ends 4 of the foils in the stack 1.

It will thus be seen that I have provided ar compact and simple unit in which the number of parts have been reduced to aminimum, while the useful functions have been materially increased.

While I have shown and described a praetical embodiment of my invention, it is tobe understood that this is merely for purposes of exemplification for the essential features may be incorporated in other specific Amechanical structures, hence I do not intend to be limited to the paiticul'ar device herein shown'except in so far as limitations to this structure appear in the sub-joined claims.

I claim:

1. A condenser comprising a stack, a air of cover plates, a pair of resilient mem ers that I have utilized each projection to perform a plurality of mounted between the plates and the stack and a clamping member engaging the plates over their entire perimeter tomaintain the Y stack interposed between the members, and

means to maintain the members and stack Aunder compression. This may be done in any desired manner.

4. ,A condenser comprlsing a pair of apertured cover plates, a pair of spring members having portions extending through the plate to prevent lateral movement of said members, a stack interposed between the members and a clamping member engaging the plates to maintain the stack under compression.

5. A condenser comprising a stack, a pair ofy cover plates provided. with oblong aper-` tures, a spring member interposed between the stack and each plate, and provided with a projection passing through the apertures to prevent rotary and lateral movement of the spring member with respect to the cover plates.

6. A condenser comprising a stack, cover plates therefor, Va clamp engaging the periphery of the plates, and terminals extending one through one plate and the other through the opposite plate.

7. A condenser comprising a stack, cover plates therefor, a clampA engaging the periphery of the plates, and terminals extending one through one plate and the other through the opposite plate, said terminals having bowed resilient members attached thereto, between the plates and the stack, to compress the stack.

8. A condenser comprising a stack, a cover plate for the stack, a resilient member mounted between the plate and the stack, and af clamping member engaging the plate Y around ,its perimeter and compressing the 10. A condenser comprising a. stack, a pro'ecting through an aperture in the late, -oover plate for the stack, a resilient memsai portlon andsai'd aperture beings aped ber mounted between the plate and the stack, to have interfitting engagement to prevent 10 and a clamping member engaging the plate rotation of said resilient member between 5 around its perimeter and compressing the the stack and the plate. stack and the resilient member against the In testimony whereof I aix my signature. plate, said resilient member having a portion LEROY E. LHENUT. 

